Combined sheet-metal hub and pulley.



. W. SPARKS. COMBINED SHEET METAL HUB 55D PULLEY.

APPLICATION TILED SURE 22, 1910.

Patented F811. 28, 1911.

A ttorneu.

To all whom it may concern:

Be it known. that l, Wnuau Sunnis. of

WILLIAM SPARKS. 0F JACKSON. MI

, union.

1 Tall.

CE IGAN. ASSIGNOR TO TNT.- SPARKS-"WITHINGTON CQMPANY, LIMITED. OF JALKSGN. MICHIGAN. A CORPORATION OF MICHIGAN.

COMBIIYED SHEET-METAL HUB AND Jackson, in the county of Jackson. =in the State of Michigan. have invented new and useful Improvements in (ouibinethFlheet- Metal Hubs and Pulleys, of which the fol-- Specification pi Letters Patent. Application filed June 22. 1810.

KELLEY.

Patented Feb.

28, 1911. Serial No. 568 359.

lowin' taken in connection with the cceompanying drawings, is a full. clear. and exact description. Y

This invention relates to a combined sheet 'metal hub and pulley for supporting and driving rotary fans and similar elements.

. The object is to produce a combined hub, pulley and blade support as a unitary structure made up compactly of comparatively thin sheet ulelal tubular elements and as seiubled in such manner as to be at once light, strong. durable and capable of being uuluufactured at a low cost ready for use in connection with any of the well known forms of fan blades.

Other objects and uses relating to specific parts of the device will be brought out in the following description.

In the drawings: Figure l is an end clevation of the combined hub and pulley showing the main portion of the winged element for receiving the fan blades. not shown. F ig. 2 is a sectional view taken on line 2-2, Fig. 1. Fig. 3 is a transverse sectional view taken on line 33. Fig. 2, except that it shows the full circular form ofvthe elements intersected by. said line. Fig. 4 is a detail illustrating a hall retaining member.

This device comprises a main hub section l, a pulley sect-ion 2-. a winged section "3- for receiving and supporting fan blades, not shown, and opposite end bearing sections -l and 5-- all of which parts are made of sheet metal permanently nested together in a manner hereinafter described. The opposite ends, as ('-aud -T. and intermediate portion, as --8, of the main huh section -1 are cylindrical and of unequal diameters, the end 6- being largest while the end 7 is considerably smaller than either the large end or intermediate portion --8- and forms at its junction with the intermediate portion an annular shoulder as best soon in F ig. 2;

The outer end of the larger portion -6- terminates in an outlurncd flange '--l(l which serves not only as a guide llangc for one side ol' the belt which travels around I the periphery of the pulley section -2, bur. also reinforces or still the hub atthis point and all'ords an ahutn'ieut against which the pulley section --2- is forced. This pulleysection -i'. is titted tiehtlv upon the periphery of and is sulistanthilly the same length as the cylindrical portion 6- of the main hub section with its outer edge abutting against the flange 1() and its inner edge formed. with an outturned annular flange l l which forms" a guide for the opposite side of -the belt. This belt section 2 ronstit-utcs the facefor such belt. The the largest. end :(lof tion -lis depressed inwardly forming an annular groove l and an inwardly projeeting annular rib -13, the latter serviu; as an abutmentfor limiting the inward movement of the adjacent. bearing section -l. In someinstances the pulley section --2- may be omitted and'the groove l2- utilized for receiving and guiding a round gripping surcentral portion of the main huh see belt which may be employed to transmit rm tary motion to the hub.

The Winged section -3 is provided with an a "ally extending annular flange llof s. htly greater ltngth than that; of the smallest cylindrical cnd -i upon which it is tightly fitted and abuts against the shoulder -f the latter forniinga lini iting stop to prevent excessive inward more meat of the winged section upon the cylindrical portion T. This winged section is also provided with a series of radially projecting arms or wings -16-- spaced 9, I

uniform distance apart. (lllll wing being formed with one or more apertures 16 for receiving rivets, not shown. by which any suitable fan blades may be secured to the arm --1(' The hearing sections 4- and -5-, as best seen in Fig. 2, preferably consist of sheet metal rings of special structure having their inner ei'lges deflected toward each other some distance inwardly from the o posile ends of the hub and in substantially the same plane andfformed with return bends constituting annular grooves or race- 'way.s- -l7 for receiving ball bearings -18-. The outer marginal ed c of the bearing section is also dezlected inwardly forming an annular flange -20- which is titted tightly within the larger end 3; of the hub section --l and against against. the

v with.

' races is to provide for the retention and 'fl'ptluli of suitable hall retaining members '*2$-- wlnrh the rib -'---t2l--. The main hell) of the beariug section between the ball race sl'4'- and flange -.0-- extends outwardly some distaui'e beyond said ball race and is disposed in substantially the 522N110 trimsrerse plane as the flange -10- thereby all'ording a neat ands-mouth end surface for the entire device. In like manner the bearing section --5- extends outwardly some distance beyond its race war 17-- and terminates in 21- which abuts adjacent end face of the reduced portion --T of the hub section, said hearing section -'-5 being tightly fitted within the reduced portion -7- to rotate there- 'lhe flange 14* is of sufiieient. length to cover the joint between the outer an outturned flange end oi the hearing section 5- and adjzn f cent end face of the hub portion 7- and tern'iinates coineidem with the end face of said hearing section to afford a smooth end surface.

The object in extending the bearing sections 4 and 5 outwardly and axially some distance. beyond their respective hall preferahly consistof thin splitrings of spring metal which when placed in position for use arespring pressed into annular grooves 19 in said bearing sections just: at the outer sides of the ball bearings 18'.

It is apparent from the foregoing deseriptiontliat the combined huh and pulley including the winged element -3, ball beariugs -1S and retainers 23' maybe made up as a unitary article of manufacture adapted to be used in connection with any suitable shatter axle -24- as shown in lnrarings' -ill one at least of which is adijustahle to tak up wear and under such {conditions I provide suitable dust-proof lpaehings --2 which are held in place against the outer faces of therelainers j ---23- hy additional rings -5 the latter f lit-in;- retained in position by shoulders --2S- on the adja ent cones The Sheet metal sections 1. 2. 3, at and 5 constitutin; the main elements of the con.-

i hiued huh and pulley are permanently and tightly nested together under pressure or E with a driving lit, so as to rotate logti .-:.-r;1s a unit, the halls and lm:l rl.stuiners being: also inserted in po ition to complete the de\ l as an article of manufacture.

What I claim is:

hand on this 18th day of May 1910.

' WILLi'AM' SlAl-ilt'if W itnesses .lon.\ A. CLARK, JAS- l. Uonm.

said axle heing provid d with cone A eonihined Sin-Qt metal huh and pulley comprising a tubular huh section having one snzali er diameter ln witness whereof I lXtH'G hQI'EUEEl'O set my 

